8391002 has 4 divisors (see below), whose sum is σ = 12586506. Its totient is φ = 4195500.

The previous prime is 8391001. The next prime is 8391011. The reversal of 8391002 is 2001938.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2001938 = 2 ⋅1000969.

It can be written as a sum of positive squares in only one way, i.e., 6651241 + 1739761 = 2579^2 + 1319^2 .

It is not an unprimeable number, because it can be changed into a prime (8391001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2097749 + ... + 2097752.

Almost surely, 2^8391002 is an apocalyptic number.

8391002 is a deficient number, since it is larger than the sum of its proper divisors (4195504).

8391002 is a wasteful number, since it uses less digits than its factorization.

8391002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4195503.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 8391002 is about 2896.7226308364. The cubic root of 8391002 is about 203.2066618241.

The spelling of 8391002 in words is "eight million, three hundred ninety-one thousand, two".